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When thinking about the "internet of things", I am imagining a home appliance that needs to connect to the home Wi-Fi and from there one can use their smartphone to control the appliance. This should remove the need for any interface of the devide (USB / LCD / etc). But how would you initially connect this device to the internet? you need some initial configuration. It make no sense to have, say, a USB interface used for initial configuration, i.e. a one-time only job. Any ideas?
All devices will require some sort of user I/O to configure WiFi. This is unavoidable, but can be simplified through some other method like you had mentioned. A reliable option would be to connect to the device via bluetooth to configure it, and then have it rely on WiFi afterward.
You may also want to take a look at how Google does it for the Chromecast. First, the Chromecast broadcasts its own WiFi signal for the user to connect to. It then uses the app to configure the WiFi. When complete, the device reboots and connects to the signal as configured by the user. Now there is no need for external interfaces (LCD, USB) and you can use the same smartphone application to configure it.
Hope this helps!
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I have been building a web application for 50k users. My application will include:
APIs + Socket server: NestJS + SocketIO
Database server: MySQL
Frontend server: ReactJS
I'm going to choose EC2 instances for those. Could you help me to choose appropriate instances for each server (eg. t2.xlarge or ...)? My application will have 3 environments: develop, staging & production.
Thanks!
Nobody can provide the information you seek.
Every application is different. Some apps are compute-intensive (eg video transcoding), some are memory-intensive (eg data manipulation) and some are network-intensive (eg video chat). Also, the way users interact with apps are different with each app.
The only way you will know the "appropriate instances for each server" is to setup a test platform, select a particular server configuration, then simulate typical usage of your application with the desired number of users (eg 50k). Monitor each server (CPU, RAM) and find any bottlenecks. Then, adjust instance type and app configurations, and test again.
Yes, it's a lot of work, but that's the only way you'll really know what system sizes and configurations are required. Or, of course, you can simply get real users on your app, monitor it very closely and make changes on-the-fly.
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How can I create a file (let's say a markdown file) that persists on the server, strictly using HTML5? So no database or web server, just an static site server.
Your question is probably too broad but you need some type of program that serves a file but not "server software" such as Apache or nginx. Just like those web servers, they are written to listen to a port on the IP address of the computer attached to an internet connection somewhere. A program to do that is actually relatively easy to write but all the needs of a proper web server aren't such as needed security and the ability to interface to other programs.
But then that program is, in essence, a server and functions in the same manner so being able to serve a file without a server of some sort in some manner isn't possible.
Whole books are written about this and one of the best is, "Advanced Programming in the Unix Environment" by Stevens and "Unix Network Programming" also by Stevens.
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I am in need of some help, here is what i have...I have build a Access Database using 2013 and have placed it on our company network. The database is updated frequently of visitors signing in and out. What i am trying to do is view the database like a report or select* from table1 (something like that) I would like to view this by HTML from browser (file://) as i will be using a IPAD that is connected to our network. I am looking for some insight our other possible ways this might work
Thanks in advance
Does your company use SharePoint?
I just created a web database relatively easily that is hosted on sharepoint.
You should be able to import your tables pretty easily.
Possibly relevant:
Move Access Web Database to Another Sharepoint Site
If you going to build a web interface, then you need to use web development tools.
You can of course adopt terminal services, and thus consume the application on an iPad or any device that supports remote desktop protocol (RDP).
And you can now “eliminate” the need for a RDP client since technology does exist that converts RDP to pure HTML5. Check out:
https://www.cybelesoft.com/thinfinity/remote-desktop/
In fact there is even an open source one here:
http://guac-dev.org/
The above will thus let you run existing Access applications in a browser – you need a server running remote desktop for this purpose.
As several mentioned, you can also adopt Access web publishing, but that choice does not support VBA, nor does it support existing forms etc. (you have to re-build your forms as access web forms and no conversion of existing forms exists).
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Can we record and playback web applications using jmeter like doing in selenium/QTP(want to test live server not using localhost)?
Thanks in advance
yes you can. http://jmeter.apache.org/usermanual/jmeter_proxy_step_by_step.pdf
this will give you a good idea.
You may use HTTP Proxy Server available in Workbench Non Test Elements to perform recording. You need to follow only below three steps:
1. Add HTTP Proxy with any port of localhost which is not being use.
2. Configure your default browser LAN settings to use localhost with port specified in above step, to be used as proxy.
3. Click on Start in JMETER Http Proxy Server followed by actions to be recorded in any browser of your choice.
You can follow this link http://jmeter.apache.org/usermanual/jmeter_proxy_step_by_step.pdf for more details as well.
Can we record and playback web applications using jmeter?
Yes. See here and here
Maybe you can try Badboy? You can download the software here:
http://www.badboy.com.au/
Here is the HOWTO document:
http://www.badboysoftware.biz/docs/jmeter.htm
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I have an application deployed in Air, written in AS3 that the client wants to install and test, I have developed a simple license app, but he is pushing for a full license which he said he will fully pay on next Monday.
How would you create a procedure in AS3 to deactivate application next Monday? How secure will it be? Will simply changing machine date bypass this?
Changing the machine date will easily bypass your security mechanism. You need something more robust, which cannot be controlled by anybody other than you.
If your application is going to run connected to the web, you might be able to poll a remote server to see if the application is allowed to run or not. This is more flexible in that you can control the validity of the application without embedding dates into it.
There might even be off-the-shelf commercial components that do this for you.
But a more serious problem is that you have reason to distrust your client. Maybe you can collect part of the money when you deliver a limited-period beta and take it on good faith that he'll give you the remainder later.